Alexandra Bellow

Alexandra Bellow, born Bagdasar, she published earlier under the name Alexandra Ionescu Tulcea, ( born August 30, 1935 in Bucharest ) is an American mathematician who deals with ergodic theory, probability theory and measure theory.

Bellow grew up as the daughter of two doctors (her father was a renowned neurosurgeon Bagdasar Dumitru, who had studied in the U.S.) in Bucharest and studied at the University of Bucharest, where she made ​​her diploma in 1957. In the same year she went with her first husband, the mathematician Cassius Ionescu Tulcea, in the U.S., where this research at Yale University. She started there with her ​​doctoral thesis in 1959 and his doctorate in Shizuo Kakutani ( Ergodic theory of random series). After that, she was at the University of Pennsylvania ( Assistant Professor from 1962 to 1964 ), the University of Illinois at Urbana -Champaign (Associate Professor 1964-1967 ) and Northwestern University, where she received a full professorship in 1968. She became Professor Emeritus in 1996. She was a visiting scholar at the Hebrew University in Jerusalem, the Caltech, from Tel Aviv University, Brandeis University, Göttingen University, the Massachusetts Institute of Technology and the University of California, Los Angeles.

With her ​​first husband, C. Ionescu Tulcea she developed in the 1960s, initiated by John von Neumann Theory lifting in functional analysis that has applications in probability theory. With him she also examined Martingale in Banach spaces. An upside of her problem was solved by Jean Bourgain. In Germany she worked with Ulrich Krengel.

In 1987 she received the Humboldt Award for U.S. scientists. In 1991, she was Noether Lecturer.

1974 to 1985 she was married to the writer Saul Bellow, and they appeared in the roman à clef Ravel stone. She was married to his third wife, from 1989 until his death in 1998, with the mathematician Alberto Calderon.

Writings

• C. Ionescu Tulcea with ( as Alexandra Ionescu Tulcea and ) Topics in the theory of liftings, Springer- Verlag, results of mathematics, Volume 48, 1969.